Improve performance of extensions using .xinitrc scripts

[jvolker]

Related to OpenframeProject/Openframe-Website#14. I just saw in /home/pi/.config/lxsession/LXDE-pi/desktop.conf the second line is window_manager=openbox-lxde-pi

Maybe switching to this window manager from matchbox could give a performance improvement?

[jvolker]

Btw it would be good if the Openframe controller would provide a way to open an app using the .xinitc templates. The website and Processing extension are using them and other extensions could profit from it too without a separate implementation in each extension.